Tag: environmental impact: global warming

Questions Related to environmental impact: global warming

Solar energy stored in material such as wood, grain, sugar, and municipal waste is called:

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. fossil fuels

  2. biomass

  3. geothermal energy

  4. natural gas

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Correct Option: B
Explanation:

Biomass contains stored energy. That's because plants absorb energy from the sun through the process of photosynthesis. When biomass is burned, this stored energy is released as heat. Burning biomass releases carbon dioxide.

 Commercial sources of alkanes include:

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. coal

  2. natural gas

  3. petroleum

  4. all of the above

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Correct Option: D
Explanation:

The most important commercial sources for alkanes are natural gas and oil. Natural gas contains primarily methane and ethane, with some propane and butane: oil is a mixture of liquid alkanes and other hydrocarbons.

When the soil of the greenhouse nurseries is sterilized with methyl bromide gas, it leads to a deficiency of:

biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. cellulose in roots

  2. chlorophyll in green leaves

  3. zinc in plants

  4. iron in red flowers

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Correct Option: C
Explanation:

Greenhouse nursery is a plant nursery where the plants are kept protected by several types of rodent and pest control product. Use of $MeBr$ gas leads to a deficiency of $Zn$ in plants as methyl bromide is very toxic.

Which is responsible for ozone depletion?

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. $CFCs$

  2. Hydrocarbons

  3. $CO _{2}$

  4. $CO$

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Correct Option: A
Explanation:

The Main Ozone-Depleting Substances        

  1. Chlorofluorocarbons (CFCs)  
  2. Halons  
  3. Methyl Chloroform
  4. Carbon Tetrachloride
  5.  Hydrofluorocarbons (HCFCs)

Green house effect is mainly due to increase in the levels of:

biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. $O _{2}$

  2. $CO$

  3. $CO _{2}$

  4. $N _{2}$

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Correct Option: C
Explanation:

A layer of carbon dioxide present in the atmosphere prevents the infrared radiations (reflected by the Earth's surface) from going out in the atmosphere. This heats up the Earth's surface and results in green house effect.

Melting of ice caps may be due to :


a) Depletion of ozone layer
b) Global warming
c) Acid rain

biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. a & b

  2. b

  3. c & a

  4. c

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Correct Option: A

The correct match is:

   List - I    List - II
 A.  Freons  1.  Rise in temperature of earth's surface
 B.  Ozone  2.  Forms holes in ozone layer
 C.  Carbon dioxide  3.  Protects life from UV raidation
 D.  Sulphur dioxide  4.  Increase in fluoride ion concentration
     5.  Acid rain
chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. A-2, B-3, C-1, D-5

  2. A-3, B-4, C-5, D-2

  3. A-1, B-3, C-4, D-2

  4. A-4, B-2, C-1, D-3

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Correct Option: A
Explanation:

Freons are responsible for the hole in ozone layer.
The life is protected from harmful UV radiation by ozone.
The temperature of earths surface rises due to increase in the level of carbon monoxide, as it is a greenhouse gas. 
Sulphur dioxide causes acid rain.

Greenhouse effect is caused by:
i) accumulation of $O _{2}$ in the atmosphere
ii) depletion of $O _{3}$ layer
iii) accumulation of $CO _{2}$ in the atmosphere

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. i and ii

  2. i only

  3. iii only

  4. i and iii

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Correct Option: C
Explanation:

Greenhouse effect:

  • The progressive heating up of the surface of the Earth is called the greenhouse effect or global warming.
  • $CO _2$ and $H _2O$ block a part of the heat (IR) emitted by the Earth and reflect it back. Due to this, the Earth's surface gets heated up.
  • 50% of $CO _2$ content of air can increase the surface temperature of the Earth by $3^oC$.
  • In addition to $CO _2$, the other greenhouse gases are $CFC$ (17%), $O _3$ (18%), $NO$ (4%) and water vapour (2%).

The gases associated with the green house effect is:

biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. $CO _{2}$

  2. $O _{2}$

  3. methene

  4. $CO$

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Correct Option: A
Explanation:

A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range. Increasing greenhouse gas emissions cause the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone

Which of the following is a set of green house gases?

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. ${\text{C}}{{\text{H}} _{\text{4}}}{\text{,}}{{\text{O}} _{\text{3}}}{\text{,}}{{\text{N}} _{\text{2}}}{\text{,S}}{{\text{O}} _{\text{2}}}$

  2. ${{\text{O}} _3}{\text{,}}{{\text{N}} _2}{\text{,C}}{{\text{O}} _{\text{2}}}{\text{,N}}{{\text{O}} _{\text{2}}}$

  3. ${{\text{O}} _3}{\text{,N}}{{\text{O}} _2}{\text{,S}}{{\text{O}} _{\text{2}}}{\text{,C}}{{\text{l}} _{\text{2}}}$

  4. ${\text{C}}{{\text{O}} _2}{\text{,C}}{{\text{H}} _4}{\text{,}}{{\text{N}} _2}{\text{O,}}{{\text{O}} _3}$

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Correct Option: D